Initial commit

src/main/java/interval/Interval.java

@@ -0,0 +1,54 @@
+package interval;
+
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.Iterator;
+import java.util.TimeZone;
+
+public abstract class Interval implements Iterator<Date> {
+	public static final String TIMEZONE = "Europe/Amsterdam";
+
+	protected Date endDate;
+	protected TimeZone timeZone;
+	protected Calendar calendar;
+
+	public Interval() {}
+
+	public Interval(Date startDate, Date endDate, String timeZoneID) {
+		setTimeZone(timeZoneID);
+		setDate(startDate, endDate);
+	}
+
+	public void setTimeZone(String timeZoneID) {
+		timeZone = TimeZone.getTimeZone(timeZoneID);
+		calendar = new GregorianCalendar(TimeZone.getTimeZone(TIMEZONE));		
+	}
+
+	public Interval(Date startDate, Date endDate) {
+		this(startDate, endDate, TIMEZONE);
+	}
+	
+	public void setDate(Date startDate, Date endDate) {
+		if (timeZone == null) {
+			setTimeZone(TIMEZONE);
+		}
+		calendar.setTime(startDate);
+		adjust();
+		this.endDate = endDate;
+	}
+
+	public void remove() {}
+
+	public Date get() {
+		return calendar.getTime();
+	}
+
+	public abstract Date next();
+
+	public boolean hasNext() {
+		return next().compareTo(endDate) < 0;
+	}
+
+	protected abstract void adjust();
+}